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Discovery
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| Discovered by | A. Borrelly |
| Discovery date | June 8, 1887 |
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Designations
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| Alternate name(s) | n/a |
| Minor planet category |
Main belt (Themis) |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 524.338 Gm (3.505 AU) |
| Perihelion | 401.688 Gm (2.685 AU) |
| Semi-major axis | 463.013 Gm (3.095 AU) |
| Eccentricity | 0.132 |
| Orbital period | 1988.806 d (5.45 a) |
| Average orbital speed | 16.93 km/s |
| Mean anomaly | 260.208° |
| Inclination | 2.437° |
| Longitude of ascending node | 120.977° |
| Argument of perihelion | 70.842° |
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Physical characteristics
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| Dimensions | 140.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 9.44 h |
| Albedo | 0.044 |
| Temperature | unknown |
| Spectral type | FC |
| Absolute magnitude (H) | 8.28 |
268 Adorea is a very large Themistian asteroid. It is classified as a primitive carbonaceous F-type/C-type asteroid.
It was discovered by A. Borrelly on June 8, 1887 in Marseilles.
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